The next day passed in a delicious, filthy haze. Nikolai and I barely left his room. We fucked on his bed, in his shower, against his desk, and even quick and dirty on the couch downstairs while we pretended to watch a movie. Every time he filled me up, he’d push his cum back inside me with his fingers and tell me to keep it there like a good little sister.

By evening, Mom and Dad still weren’t back, and Nikolai had a scheduled ranked stream at 9 p.m.

I spent an hour getting ready in my room, heart racing with wicked excitement. I wanted to push him further. I...